Finding the Fourth Proportional to 10,978.13, 16,469.33 and 3,580.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.13 : 16,469.33 = 3,580.61 : x
2. Step 2: Convert to fraction form
   10,978.13/16,469.33 = 3,580.61/x
3. Step 3: Cross multiply
   10,978.13x = 16,469.33 × 3,580.61
4. Step 4: Simplify right side
   10,978.13x = 58,970,147.44
5. Step 5: Solve for x
   x = 58,970,147.44/10,978.13
6. Step 6: Final answer
   x = 5,371.60